Struct StaticEnvironment 

pub struct StaticEnvironment { /* private fields */ }

An Environment implementation in which all variables and functions are known ahead of execution. All variable and function names treated as case-insensitive.

Implementations

impl StaticEnvironment

pub fn add_variable(&mut self, name: &str, value: Value)

Adds or updates a single variable.

pub fn remove_variable(&mut self, name: &str) -> Option<Rc<Value>>

Removes a variable and return its Rc<Value> if it existed.

pub fn clear_variables(&mut self)

Clears all variables.

pub fn add_function(&mut self, func: Function)

Adds or updates a NativeFunction.

pub fn add_functions(&mut self, functions: Vec<Function>)

Calls add_function for a Vec<Function>.

pub fn remove_function(&mut self, name: &str) -> Option<Rc<Function>>

Removes a NativeFunction and return its Function if it existed.

pub fn list_functions(&self) -> Vec<Rc<Function>>

Output all currently registered Function structs as Rc.

Trait Implementations

impl Default for StaticEnvironment

fn default() -> StaticEnvironment

Returns the “default value” for a type.

impl Environment for StaticEnvironment

fn variable(&self, name: &str) -> Option<Rc<Value>>

Get a variable Value from the Environment.

fn call(&self, name: &str, params: &[Value]) -> NativeResult

Call a Function and may return a Value.

fn variable_exists(&self, name: &str) -> bool

Checks if a variable with a matching name exists.

fn function_exists(&self, name: &str, param_count: usize) -> FunctionResult

Checks if a function with a matching name and compatible arity exists.